Solid line = floor (spellings that unambiguously belong to the group). Shaded band up to the dashed edge = ceiling (the most it could reach if every ambiguous spelling counted here).
Drew has been climbing in recent years. All-time it's been given to 97,475 U.S. babies, the 499th most common name by sound today, peaking at 2,585 in 1995, with 1,523 in 2025.
By sound, Drew also includes the spellings Dru, Drue, Jrue.